This type of individual firmly believes that their mundane thoughts are actually interesting or relevant to those they twitter to. This person wastes time telling others how they are wasting time.

Bill: "Dude, I just got a twitter from Hank telling me he's scoping out some hot women at a club in Reno."

Ted: "He's such a twitter-twat! He'd rather take the time to tell you about those hot women than actually try to hook up with them? Wait... You have a twitter account? You're a twitter-twat, too! Fuck, I need some new friends...!"